InsiderFlow

MRK

Merck & Co., Inc.$110.50+0.28 (+0.25%)
Prev Close$110.23·MCap$289.58B·P/E15.18·Vol2.70M·Yield0.03%

Buys (12M)

0

$0.00

Sells (12M)

17

$33.04M

Net Activity

Net Seller

$33.04M

Active Insiders

10

last 12 mo

Over the past 12 months, insider activity at Merck & Co., Inc. (MRK) has been exclusively selling, with 0 insider purchases totaling $0.00 and 17 insider sales totaling $33.04M. The most recent insider transaction was by Guindo Chirfi (officer: Chief Marketing Officer), who sold $1.21M worth of shares on Feb 12, 2026. Merck & Co., Inc. operates in the Healthcare sector, within the Drug Manufacturers - General industry, with a market cap of $289.58B.

MRK Insider Trading Activity

DateInsiderTypeValue
Feb 12, 2026 Guindo ChirfiSell$1.21M
Feb 10, 2026 Li Dean YSell$1.20M
Feb 9, 2026 Guindo ChirfiSell$1.18M
Feb 9, 2026 Zachary JenniferSell$4.63M
Feb 6, 2026 Davis Robert MSell$5.60M
Feb 6, 2026 Li Dean YSell$1.79M
Feb 6, 2026 DeLuca Richard R.Sell$4.56M
Feb 6, 2026 Litchfield CarolineSell$5.02M
Feb 6, 2026 Guindo ChirfiSell$2.44M
Feb 6, 2026 Williams David MichaelSell$609.5K
Feb 6, 2026 Oosthuizen Johannes JacobusSell$1.83M
Feb 6, 2026 Smart Dalton E. IIISell$765.9K
Nov 4, 2025 Williams David MichaelSell$720.0K
Aug 5, 2025 Williams David MichaelSell$668.6K
May 2, 2025 Smart Dalton E. IIISell$24.4K
May 2, 2025 Larson Betty DSell$436.5K
Apr 29, 2025 Smart Dalton E. IIISell$352.7K
Feb 20, 2025 Oosthuizen Johannes JacobusSell$714.7K
Feb 11, 2025 Oosthuizen Johannes JacobusSell$558.9K
Feb 7, 2025 Downing Cristal NSell$209.6K
Mar 11, 2024 Merck & Co., Inc.Buy$492.14M0.9% OS
Feb 15, 2024 Davis Robert MSell$29.54M
Feb 15, 2024 Litchfield CarolineSell$4.81M
Feb 14, 2024 Romanelli JosephSell$124.9K
Feb 12, 2024 Li Dean YSell$1.85M
Feb 8, 2024 Williams David MichaelSell$185.1K
Feb 5, 2024 Oosthuizen Johannes JacobusSell$2.41M
Feb 2, 2024 Zachary JenniferSell$6.28M
Feb 2, 2024 MIZELL STEVENSell$6.42M
Nov 13, 2023 Oosthuizen Johannes JacobusSell$213.1K
Nov 9, 2023 DeLuca Richard R.Sell$4.60M
Aug 15, 2023 MIZELL STEVENSell$463.3K
Aug 4, 2023 MIZELL STEVENSell$474.7K
Aug 3, 2023 Romanelli JosephSell$9.6K
Jun 30, 2023 Romanelli JosephBuy$44.3K
Jun 30, 2023 Romanelli JosephSell$3.7K
May 5, 2023 MIZELL STEVENSell$6.36M
May 5, 2023 Zachary JenniferSell$2.25M
May 5, 2023 Karachun Rita ASell$1.87M
May 3, 2023 Williams David MichaelSell$877.2K
May 2, 2023 DeLuca Richard R.Sell$16.36M
Apr 28, 2023 Davis Robert MSell$16.47M
Apr 14, 2023 Chattopadhyay SanatSell$15.43M
Feb 16, 2023 Romanelli JosephSell$541.1K
Feb 14, 2023 MIZELL STEVENSell$198.0K
Feb 10, 2023 MIZELL STEVENSell$535.0K
Feb 8, 2023 MIZELL STEVENSell$462.5K
Feb 6, 2023 Zachary JenniferSell$7.78M
Jan 11, 2023 Chattopadhyay SanatSell$9.43M
Nov 10, 2022 Oosthuizen Johannes JacobusSell$185.3K
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MRK Insider Buying Activity

The following table shows recent insider purchases of Merck & Co., Inc. (MRK) stock reported via SEC Form 4 filings.

DateInsiderTypeValue
Mar 11, 2024 Merck & Co., Inc.Buy$492.14M0.9% OS
Jun 30, 2023 Romanelli JosephBuy$44.3K

MRK Insider Selling Activity

The following table shows recent insider sales of Merck & Co., Inc. (MRK) stock reported via SEC Form 4 filings.

DateInsiderTypeValue
Feb 12, 2026 Guindo ChirfiSell$1.21M
Feb 10, 2026 Li Dean YSell$1.20M
Feb 9, 2026 Guindo ChirfiSell$1.18M
Feb 9, 2026 Zachary JenniferSell$4.63M
Feb 6, 2026 Davis Robert MSell$5.60M
Feb 6, 2026 Li Dean YSell$1.79M
Feb 6, 2026 DeLuca Richard R.Sell$4.56M
Feb 6, 2026 Litchfield CarolineSell$5.02M
Feb 6, 2026 Guindo ChirfiSell$2.44M
Feb 6, 2026 Williams David MichaelSell$609.5K
Feb 6, 2026 Oosthuizen Johannes JacobusSell$1.83M
Feb 6, 2026 Smart Dalton E. IIISell$765.9K
Nov 4, 2025 Williams David MichaelSell$720.0K
Aug 5, 2025 Williams David MichaelSell$668.6K
May 2, 2025 Smart Dalton E. IIISell$24.4K
May 2, 2025 Larson Betty DSell$436.5K
Apr 29, 2025 Smart Dalton E. IIISell$352.7K
Feb 20, 2025 Oosthuizen Johannes JacobusSell$714.7K
Feb 11, 2025 Oosthuizen Johannes JacobusSell$558.9K
Feb 7, 2025 Downing Cristal NSell$209.6K
Feb 15, 2024 Davis Robert MSell$29.54M
Feb 15, 2024 Litchfield CarolineSell$4.81M
Feb 14, 2024 Romanelli JosephSell$124.9K
Feb 12, 2024 Li Dean YSell$1.85M
Feb 8, 2024 Williams David MichaelSell$185.1K
Feb 5, 2024 Oosthuizen Johannes JacobusSell$2.41M
Feb 2, 2024 Zachary JenniferSell$6.28M
Feb 2, 2024 MIZELL STEVENSell$6.42M
Nov 13, 2023 Oosthuizen Johannes JacobusSell$213.1K
Nov 9, 2023 DeLuca Richard R.Sell$4.60M
Aug 15, 2023 MIZELL STEVENSell$463.3K
Aug 4, 2023 MIZELL STEVENSell$474.7K
Aug 3, 2023 Romanelli JosephSell$9.6K
Jun 30, 2023 Romanelli JosephSell$3.7K
May 5, 2023 MIZELL STEVENSell$6.36M
May 5, 2023 Zachary JenniferSell$2.25M
May 5, 2023 Karachun Rita ASell$1.87M
May 3, 2023 Williams David MichaelSell$877.2K
May 2, 2023 DeLuca Richard R.Sell$16.36M
Apr 28, 2023 Davis Robert MSell$16.47M
Apr 14, 2023 Chattopadhyay SanatSell$15.43M
Feb 16, 2023 Romanelli JosephSell$541.1K
Feb 14, 2023 MIZELL STEVENSell$198.0K
Feb 10, 2023 MIZELL STEVENSell$535.0K
Feb 8, 2023 MIZELL STEVENSell$462.5K
Feb 6, 2023 Zachary JenniferSell$7.78M
Jan 11, 2023 Chattopadhyay SanatSell$9.43M
Nov 10, 2022 Oosthuizen Johannes JacobusSell$185.3K

MRK Insiders

Guindo Chirfi

officer: Chief Marketing Officer

Sold $4.84M
3 tradesLast: Feb 12, 2026
Li Dean Y

officer: Executive VP & President, MRL

Sold $4.84M
3 tradesLast: Feb 10, 2026
Zachary Jennifer

officer: EVP, General Counsel

Sold $37.37M
5 tradesLast: Feb 9, 2026
Oosthuizen Johannes Jacobus

President, U.S. Market

Sold $10.81M
8 tradesLast: Feb 6, 2026
Litchfield Caroline

officer: EVP & CFO

Sold $11.50M
3 tradesLast: Feb 6, 2026
Smart Dalton E. III

SVP Fin. - Global Controller

Sold $1.14M
3 tradesLast: Feb 6, 2026
DeLuca Richard R.

officer: EVP&Pres, Merck Animal Heallth

Sold $56.57M
6 tradesLast: Feb 6, 2026
Davis Robert M

director, officer: Chairman, CEO & President

Sold $68.78M
4 tradesLast: Feb 6, 2026
Williams David Michael

officer: EVP,Chief Info&Digital Officer

Sold $3.06M
5 tradesLast: Feb 6, 2026
Larson Betty D

EVP, Chief HR Officer

Sold $436.5K
1 tradesLast: May 2, 2025
Downing Cristal N

Chief Comm. & Public Afrs Ofcr

Sold $209.6K
1 tradesLast: Feb 7, 2025
Merck & Co., Inc.

Bought $492.14M
1 tradesLast: Mar 11, 2024
Romanelli Joseph

President, Human Health Int?l

Bought $44.3KSold $679.2K
5 tradesLast: Feb 14, 2024
MIZELL STEVEN

EVP, Chief HR Officer

Sold $20.94M
9 tradesLast: Feb 2, 2024
Karachun Rita A

Sr. VP Fince-Global Controller

Sold $7.29M
3 tradesLast: May 5, 2023
Chattopadhyay Sanat

Exe V-P & Pres. MMD

Sold $37.05M
4 tradesLast: Apr 14, 2023
FRAZIER KENNETH C

Executive Chair

Sold $271.46M
5 tradesLast: Nov 8, 2022
Gerberding Julie L.

EVP, Chief Patient Officer

Sold $8.46M
1 tradesLast: Nov 3, 2021
Clyburn Frank

EVP & Pres ? Human Health

Sold $5.01M
2 tradesLast: Nov 2, 2021